var flag=false//全局变量
function show_menu(){
	var title1 = document.getElementById("ul_title");
	if(flag){
		title1.style.display="none";
		flag=false;
	}else{
		title1.style.display="block";
		flag=true;
	}
}
function show_menu1(){
	var title1=document.getElementById("title");
	title1.style.display="none";
	flag=false;
}